This is an optional ST Racing Concepts CNC Machined Aluminum Shock Cap Set, and is intended for use with the Axial Wraith and Axial EXO Terra Buggy. These CNC machined aluminum upper shock caps will help to increase durability compared to the stock plastic caps, and add great looks to your ride. Combine these shock caps with the ST Racing shock bodies (SPTSTA80036), to complete the conversion and make your Axial Wraith or EXO stand out from the crowd!